Grand County, Colorado — public water systems
At a glance
77 active public water systems are filed under Grand County, Colorado in EPA's SDWIS records, together reporting 56,067 people served. The largest is Winter Park Wsd, which reports serving 6,635 people. 24 are community water systems serving people where they live; the other 53 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
77
Population served
56.1K
Community systems
24
Groundwater share
89.6%
How does Grand County compare with other Colorado counties?
Grand County has the 8th-most active public water systems among the 113 counties listed for active Colorado systems in EPA records; among the 65 with 3 or more systems, the median has 18. Its systems report 56,067 people served in total, the 19th-largest county figure in the state and 0.7% of the statewide total. The average system here reports serving 728 people, well below the Colorado average of 3,400. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Grand County's drinking water come from?
By primary water source, Grand County's active systems draw on groundwater (61, 79%), groundwater under influence of surface water (7, 9.1%), surface water (6, 7.8%) and purchased surface water (2, 2.6%). Overall, 90% rely mainly on groundwater (including purchased groundwater) and 10% on surface water, compared with 74% and 26% across Colorado. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Winter Park Wsd, draws primarily on surface water.
What kinds of water systems operate in Grand County?
Grand County's active systems break down as 24 community systems (31%), 10 non-transient non-community systems (13%) and 43 transient non-community systems (56%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (60%), local government (22%) and federal government (18%).
The 50 largest water systems in Grand County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Winter Park Wsd | Grand | 6,635 | Community | Surface water |
| 2 | Grand County Water No 1 | Grand | 5,400 | Community | Surface water |
| 3 | Winter Park Resort Sunspot | Grand | 5,006 | Transient non-community | Groundwater |
| 4 | Winter Park Resort Snoasis | Grand | 5,001 | Transient non-community | Groundwater |
| 5 | Winter Park Resort Lunch Rock | Grand | 5,001 | Transient non-community | Groundwater |
| 6 | Winter Park Ranch Wsd | Grand | 3,250 | Community | Groundwater |
| 7 | Granby Town of South Service Area | Grand | 2,300 | Community | Groundwater under influence of surface water |
| 8 | Fraser Town of | Grand | 2,150 | Community | Groundwater |
| 9 | Grand Lake Town of | Grand | 2,035 | Community | Groundwater |
| 10 | Granby Town of North Service Area | Grand | 2,025 | Community | Surface water |
| 11 | Kremmling Town of | Grand | 1,859 | Community | Surface water |
| 12 | Winter Park Resort Vasquez Ridge | Grand | 999 | Transient non-community | Groundwater |
| 13 | Stillwater Cg | Grand | 990 | Transient non-community | Groundwater |
| 14 | Winter Park Resort Discovery | Grand | 812 | Transient non-community | Groundwater |
| 15 | Arapaho Bay Cg | Grand | 720 | Transient non-community | Groundwater |
| 16 | Hot Sulphur Springs Town of | Grand | 687 | Community | Surface water |
| 17 | Green Ridge Cg | Grand | 624 | Transient non-community | Groundwater |
| 18 | Young Life Crooked Creek | Grand | 595 | Non-transient non-community | Groundwater |
| 19 | Ymca Snow Mtn Ranch | Grand | 578 | Community | Groundwater under influence of surface water |
| 20 | Tabernash Meadows Wsd | Grand | 564 | Community | Groundwater |
| 21 | Smith Creek Crossing | Grand | 518 | Community | Purchased groundwater |
| 22 | Blm Pumphouse Recreation Site | Grand | 500 | Transient non-community | Groundwater |
| 23 | Pole Creek Golf Club | Grand | 490 | Non-transient non-community | Groundwater |
| 24 | Devils Thumb Ranch Resort | Grand | 451 | Non-transient non-community | Groundwater |
| 25 | Columbine Lake Wsd | Grand | 428 | Community | Groundwater |
| 26 | Blue Valley Md | Grand | 410 | Community | Groundwater under influence of surface water |
| 27 | North Shore Wsd | Grand | 378 | Community | Groundwater |
| 28 | Rmnp Headquarters West | Grand | 313 | Transient non-community | Groundwater |
| 29 | Timber Creek Cg | Grand | 304 | Transient non-community | Groundwater |
| 30 | Soda Springs Wa | Grand | 280 | Community | Groundwater |
| 31 | C Lazy U Ranch | Grand | 251 | Non-transient non-community | Groundwater under influence of surface water |
| 32 | Lake Forest Mutual Wc | Grand | 250 | Community | Groundwater |
| 33 | Church of Eternal Hills | Grand | 245 | Non-transient non-community | Groundwater |
| 34 | Roadhouse Bar and Grill | Grand | 204 | Transient non-community | Groundwater |
| 35 | Granby Jones MHP | Grand | 201 | Community | Groundwater |
| 36 | Sunset Point Cg | Grand | 200 | Transient non-community | Groundwater |
| 37 | Arapaho Valley Ranch | Grand | 185 | Transient non-community | Groundwater |
| 38 | Roadside Tp | Grand | 168 | Transient non-community | Groundwater |
| 39 | Climax Molybdenum Co Henderson Mill | Grand | 165 | Non-transient non-community | Surface water |
| 40 | Fraser Valley Sports Complex | Grand | 156 | Transient non-community | Groundwater |
| 41 | Cutthroat Bay Group Area | Grand | 150 | Transient non-community | Groundwater |
| 42 | Winding River Resort Village | Grand | 150 | Transient non-community | Groundwater |
| 43 | River Ranch Village MHP LLC | Grand | 140 | Community | Purchased surface water |
| 44 | Winter Park Christian Church | Grand | 135 | Non-transient non-community | Groundwater |
| 45 | The Shores of Shadow Mountain Hoa | Grand | 131 | Transient non-community | Groundwater |
| 46 | T Lazy W Mp | Grand | 128 | Transient non-community | Groundwater |
| 47 | Shadow Mountain Village | Grand | 115 | Non-transient non-community | Groundwater |
| 48 | Wolford Mtn Recreation Area | Grand | 100 | Transient non-community | Purchased surface water |
| 49 | Moraine Park Ws | Grand | 100 | Community | Groundwater |
| 50 | Chuck Wagon Cafe | Grand | 85 | Transient non-community | Groundwater |
All other water systems in Grand County (26)
The remaining active systems filed under Grand County, largest first, with the population each reports serving.
- Trail Ridge Marina82
- Northern Water West Slope Campus80
- South Fork Cg East80
- South Fork Cg West80
- Olympic Village75
- St Louis Creek Cg No 2 West72
- St Louis Creek Cg No 1 East72
- Drowsy Water Ranch71
- Timberline Lodge68
- Debbies Drive in66
- Ouray Ranch Hoa64
- Idlewild Cg64
- Lakeshore Mobile Home Park58
- Shorewood Subd56
- Town of Winter Park Lift Transit Wts55
- Parshall Inn the50
- Granby Barn Store50
- Valley at Winter Park Wd50
- Timberline Inn46
- Bar Lazy J Guest Ranch45
- Mountain Lakes Lodge44
- Tabernash Tavern40
- Grand Lake Golf Course38
- Homestead Motel33
- Hideaway Mountain Lodge33
- Latigo Ranch33
Grand County water systems: frequently asked questions
How many public water systems are in Grand County, Colorado?
EPA's SDWIS records file 77 active public water systems under Grand County, Colorado: 24 community systems (31%), 10 non-transient non-community systems (13%) and 43 transient non-community systems (56%).
Who supplies drinking water in Grand County, CO?
The largest community water systems filed under Grand County are Winter Park Wsd (6,635 people served), Grand County Water No 1 (5,400 people served) and Winter Park Ranch Wsd (3,250 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Grand County's drinking water come from groundwater or surface water?
Of the 77 active public water systems in Grand County, 90% draw mainly on groundwater and 10% on surface water, counting purchased supplies. The largest system, Winter Park Wsd, uses surface water.
Where can I find a water quality report for Grand County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 24 community systems are filed under Grand County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Grand County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Colorado water systems
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Grand County, Colorado”, https://aquacensus.com/water-systems/colorado/grand (data as of October 1, 2026).